/*
 * MCreator (https://mcreator.net/)
 * Copyright (C) 2012-2020, Pylo
 * Copyright (C) 2020-2024, Pylo, opensource contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package net.mcreator.util;

import java.net.InetSocketAddress;
import java.net.ServerSocket;

public class NetworkUtils {

	public static int findAvailablePort(int... toTry) {
		for (int port : toTry) {
			if (isPortAvailable(port)) {
				return port;
			}
		}

		try (ServerSocket socket = new ServerSocket()) {
			socket.bind(new InetSocketAddress("localhost", 0));
			return socket.getLocalPort();
		} catch (Exception e) {
			// if we fail to bind to unique port, we'll return -1 (error)
			return -1;
		}
	}

	private static boolean isPortAvailable(int port) {
		try (ServerSocket socket = new ServerSocket()) {
			socket.bind(new InetSocketAddress("localhost", port));
			return true;
		} catch (Exception e) {
			return false;
		}
	}

}
